COOLING SYSTEM
7-8
6LPA Service Manual
Seawater Pump Components
© 2007 Yanmar Marine International
Seawater Pump Disassembly
1. Disconnect the hose joint and remove the
seawater pump.
2. Remove the end plate and pull out the impeller.
The cam can be removed after removing the set
screw.
3. Loosen the M16 nut on the drive side and pull
out the gear the remove the retaining ring and
pull out the shaft.
4. Check the impeller, inner sliding surface of the
pump housing and the cam for excessive wear
and damage. Replace as necessary.
5. Turn the shaft to check that it turns smoothly.
Check the bearing for play. Replace as
necessary.
6. If oil or water leakage is discovered at the hole
of the pump bottom, replace the oil seal.
Seawater Pump Reassembly
1. Apply grease to the oil seal and bearing.
2. Insert the impeller while turning it in the
operating direction (clockwise).
